Polyscope



UNITED STATES PATENT OFFICE.

GEORGE MAY POWELL, OF VINELAND,NEW JERSEY.

PO'LYSCOP'E.

SPECIFICATION forming specification and accompanying drawings, in

whicha.

Figure l is a side elevation of the polyscope embodying my invention. Fig. 2 is a front end view of a portiomthereof. Fig. 3 is a rear end view of a portion thereof. Fig. dis a vertical section in line as m, Fig. 2. Fig. 5 is a view of a detached portion. Fig. 6 is a view of a modification.

Similar letters of reference indicate corresponding parts in the several figures.

My invention consists of certain improvements in stereoscopic and other instruments of an analogous class, as will be hereinafter fully set forth.

Referring to the drawings, A represents a standard, which is mounted on the base B, and

has pivoted to it the support 0 for the hood D V and held in position by buttons or other fast-' enings, as etc; or the frame of the hood may have a vertical dovetailed groove, as in Fig. 6, to receive the glass. In either case the glass may be removed and provision made for using a stereoscopic, graphoscopic, or other glass, a stereoscopic glass being shown in Fig. 2 and a graphoscopic glass in Fig. 5.

When it is not desired to employ the stand A it is disconnected from the support 0, and in lieu thereof I employ the usual handle, J, with attaching-stem a. (Shown in dotted lines, Fig. 1, or full in Fig. 5.) In the latter case the graphoscopic glass beingheld bythe handle J, may be employed as a reading or magnifyin g glass, the frame H of said glass having an part of Letters Patent No. 268,432, dated December 5, 1882, Application filed October 18,1881. -(No model.)

opening in its bottom to receive the connecting end of the handle, The handle J has also secured to it afimicroscope, K, which may be used whether the handle is attached to the glass H or the support 0, or separate from either.

The picture-holder E is formed of the bottom slide, E, which is fitted to the support 0,

and two wires or standards, E, for each side,

so that the picture may be placed on the holder between the wires and properly sustained while being viewed through the glass.

L represents an extensible shade, cover, or

bellows-frame, formed as shown in Fig. 1, for 6 the purpose of extending the same to any desired distance at will, the forward end of which is formed with openings b, preferably eyeleted, so as to be fitted on the pins or standards G of the hood, and the rear end has a frame,

just the focus, the'frame screening the picture So from light from within and producing the best effects thereon.

The divisor N of the stereoscope is made removable from the support O, and when applied thereto is firmly held in position by the part 8 5 d entering a notch or opening, 6, in said support (3; or it may be connected to the removable glass or lens frame shown in Fig. 6, so as to be removed therewith. For stereoscopic purposes the divisor is employed,as usual; but 0 for graphoscopic and other purposes said divisor is removed.-

1? represents a camera lucida, which is conneoted to a stem, P, the end of which is adapted to be inserted in an opening,f, in the 5 standard A, thus sustaining said camera lucida and locating it in a convenient manner for its peculiar purposes.

The base B isformed of two pieces, B, crossing each other and rabbeted. at the lower end of the standard is fitted into the center of the cross-pieces, as in Fig. 1, and

A screw, B,

thus the base is firmly connected to the standard and held securely spread out. By unscrewin g the standard the pieces B maybe separated and folded in compact form with the standard and other parts of the implement.

It is evident that glasses for landscapes, eclipses, 850., may be applied to the frame of the hood B, and made removable, and held as in the case of the stereoscopic and graphoscopic glasses or lenses hereinbefore set forth.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The hood D, removable frame H H, having an opening in its bottom, and the support 0, having means of attachment both for the stand A and. handle J, said handle being adapted to be connected with said frameH H,

substantially as and for the purpose set forth.

2. The extensible shade or hood L, formed 20 with a vertical passage, L, and provided with means for attaching it at opposite ends to the hood and picture-holder, substantially as and for the purpose set forth.

3. The removable extensible shade or hood L, formed with openings b for attaching it in front to the standards Gr, and sleeves'M for attaching it at the rear to the standards E, substantially as and for the purpose set forth.

4. ThehandleJ,with aconnected microscope, formed at one end with an attaching-stem, a, and adapted to be used with either the support 0 or frame H H, substantially as and for the purpose set forth.

' GEO. MAY POWELL.

Witnesses:

JOHN A. WIEDERSHEIM, W. F. KIROHER. 

